Wheelchair

申请公布号：

US6715780(B2)

申请号：

US20010977424

申请日期：

2001.10.15

申请公布日期：

2004.04.06

申请人：

SCHAEFFER JON ERIC;SCHAEFFER JEROME EDWIN

发明人：

SCHAEFFER JON ERIC;SCHAEFFER JEROME EDWIN

分类号：

A61G5/02;(IPC1-7):B62M1/14

主分类号：

A61G5/02

摘要：

A manual wheelchair system comprising of a pair of lever arms positioned on each side of the chair that actuate a propulsion system located entirely under the seat of the wheelchair. Both the push and pull stroke of the levers, unlimited by stroke angle, provides unidirectional forward propulsion to the rear wheels of the chair. This is accomplished through drive gears fitted with one-way clutches and idler gears intermeshing with them. A sprocket is attached to one drive gear, and connects to an internal shifting hub using a chain or belt. This hub could optionally be a manual or automatic unit, with the automatic shifting unit relying on sensory feedback from the rear drive wheel to determine the most efficient ratio of operation. The hub connects to the rear drive axle through another sprocket and chain combination and drives the rear wheel as the levers are manipulated. The rear axle has a disconnecting clutch so that the entire drive propulsion system can disengaged from the chair. This allows the operator to use the wheelchair in a conventional manner (by hand directly at the wheel handrails).